I was looking around at VsTank stuff and something just popped into my head to try for guard rails on the Fat Track/NASCAR SuperSpeedway for radio control racing. CD jewel cases! I tried a regular sized one and it didn't really fit, but then I tried one of the slim line cases I had it fits nice and snug. With some dremel work or even a jewlers saw in a mitre box I think I can make some very nice guard rails out of these. I should have some of these fabricated very soon and will post pics when I have a set made.